If an X-Ray Beam of Wavelength 1

question 3

Multiple Choice

If an X-ray beam of wavelength 1.4 × 10^-10 m makes an angle of 30° with a set of planes in a crystal causing first order constructive interference, what is the plane spacing?

• A)2.8 × 10^-10 m
• B)0.7 × 10^-10 m
• C)3.2 × 10^-10 m
• D)1.6 × 10^-10 m
• E)1.4 × 10^-10 m